{"id":"195626f3-5f1b-4403-93b7-e6cfd4d6a078","title":"Suspicious SSL Connection","description":"Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol.","author":"frack113","status":"test","level":"low","date":"2022-01-23","modified":"","tags":["attack.command-and-control","attack.t1573"],"technique_ids":["T1573"],"logsource":{"product":"windows","category":"ps_script","definition":"Requirements: Script Block Logging must be enabled"},"falsepositives":["Legitimate administrative script"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1573/T1573.md#atomic-test-1---openssl-c2","https://medium.com/walmartglobaltech/openssl-server-reverse-shell-from-windows-client-aee2dbfa0926"],"source_path":"rules/windows/powershell/powershell_script/posh_ps_susp_ssl_keyword.yml","source_sha256":"a5b7e19bef10c2ca0541649f39024a6d910d26962040a071a48c2ce187aa1dc3","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/powershell/powershell_script/posh_ps_susp_ssl_keyword.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious SSL Connection\nid: 195626f3-5f1b-4403-93b7-e6cfd4d6a078\nstatus: test\ndescription: Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1573/T1573.md#atomic-test-1---openssl-c2\n    - https://medium.com/walmartglobaltech/openssl-server-reverse-shell-from-windows-client-aee2dbfa0926\nauthor: frack113\ndate: 2022-01-23\ntags:\n    - attack.command-and-control\n    - attack.t1573\nlogsource:\n    product: windows\n    category: ps_script\n    definition: 'Requirements: Script Block Logging must be enabled'\ndetection:\n    selection:\n        ScriptBlockText|contains|all:\n            - System.Net.Security.SslStream\n            - Net.Security.RemoteCertificateValidationCallback\n            - '.AuthenticateAsClient'\n    condition: selection\nfalsepositives:\n    - Legitimate administrative script\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1573","id":"T1573","name":"Encrypted Channel","page":"techniques/enterprise/T1573/"}],"data_path":"data/detection-rules/195626f3-5f1b-4403-93b7-e6cfd4d6a078.json","kind":"sigma"}